The Nokia Lumia 800, which was codenamed 'Sea Ray', is a smartphone that was launched by Nokia on October 26, 2011, at the Nokia World 2011 event. Initially, it operated on Snapdragon S2 processor and Windows Phone 7.5 "Mango" and was the first device manufactured by Nokia to run on the Windows Phone operating system. This marked a significant shift for the company from using Symbian for their smartphones. Upon its original release in November 2011 in Europe, it was Nokia's flagship product and was hence a crucial product for their mobile phone business.